Lcr lasergrip - Crimson Trace Ruger LCR Laser Sight

Accurate without adjustments. Installs in a minute. Simple to use, almost foolproof. Doesn't interfere with holsters. Fits hands as well as the stock grip. A little pricey, but over the years it won't matter.
Pros: Quick, easy, accurate, reliable
Cons: none

This review was written in the old system and had content requirements that are different than reviews written today.